As police and search crews scour the seas around Malaysia and Vietnam for missing jet MH370, a satellite company is letting web users around the world help in the hunt online.

DigitalGlobe has spent the last five days uploading high-resolution satellite and aerial images to its Tomnod site that let people explore the seas for clues about the crash, as well signs of a wreckage or oil slick.

Images are then tagged by users and analysed by experts before the most significant sightings are sent to the search teams in Asia.

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DigitalGlobe has put its high-resolution satellite images online so people can search for the missing Malaysia flight. User Mike Seberger tagged this image of what appears to be the wreckage of a plane underwater. The sighting is now being investigated by experts

WHAT COULD HAVE HAPPENED?

A mid-air explosion: The lack of debris could be explained by it falling into Malaysian jungle.

A terrorist attack: Director of CIA has said terrorism could not be ruled out

Power failure: Possibly caused by deliberate cutting of power to communication instruments

Electronic warfare: 20 passengers on board were experts in this technology.

Hijacking: Radar data indicates the plane might have made a U-turn.

A pilot error: There is a chance of them in all air mysteries, claim experts

More than 25,000 people have already signed up to help search for the plane online. Initial search efforts concentrated on waters between Malaysia and Vietnam before being extended to the Malacca Strait and the Andaman Sea. DigitalGlobes imagery, pictured, is being uploaded to reflect this change

More than 25,000 people have already signed up to help search for the plane, and as a result the site has repeatedly crashed.

Initial search efforts concentrated on waters between Malaysia and Vietnam before being extended to the Malacca Strait and the Andaman Sea.

Users zoom in on each image and drop a pin if they spot anything they believe is related to the crash, such as a wreckage or life raft

DigitalGlobe’s imagery is being uploaded to reflect this search area – although it covers approximately 27,000 square nautical miles (92,000 square km), meaning there may be a delay.

To use the site, users zoom in on each satellite image and drop a pin if they spot anything they believe could be related to the crash.

The system additionally has a tool that will search for and automatically flag any overlapping tags, suggesting more than one person has found something significant in that region.

All of these tags are analysed by experts and the top ten most likely and significant spots will be shared with the Malaysian authorities.

DigitalGlobe's Luke Barrington said that before passing any information over to the authorities, the experts are working on being 100 per cent sure its relevant so not to waste the search teams’ time or give anyone false hope.

This is not the first time Tomnod has been used in this way.

Following
Typhoon Haiyan in the Phillipines in November, thousands of people
signed up to search for and identify missing objects and damaged
landmarks.

‘We are working
to best handle an unprecedented level of web traffic and interest in
supporting the Malaysia Airlines jetliner search,’ the Colorado company
said in a statement.

‘Please check back soon. We have new
imagery collections planned for today and hope to make those images
available online for the crowd as soon as possible.’

There
is still no trace of the plane and a total of nine aircraft and 24
ships have already been deployed to search for the wreckage.

The search for the missing aircraft has widened considerably after previous prediction of its whereabouts proved fruitless. It remains a mystery how a Boeing 777 could have disappeared without a trace in such relatively shallow seas

Vietnamese military personnel prepare a helicopter for a search and rescue mission for the missing Malaysia Airlines flight